Tollee suddenly feels very small and stupid. Hide it. She can't just say 'we didn't think that far ahead because we were kids, one of which had nothing to live for, desperately concocting a Hail Mary scheme we didn't actually expect to work.' This is generations of Tollee's people. Suddenly she feels the horrible weight of what she's gambling with and it's choking, it's too much, but - it's still an obvious right choice, right, even if it takes years, if the humans think it might be worth it to them, it's worth it.
"We're leaving that up to you. It shouldn't take a season for the three heroes, or whoever wants to come, to make a round trip - just a moon cycle, or at least it took me half a moon cycle to get here. My honest estimate of the number of ferryshaft who will want to come is" - her heart beats in her throat, she wasn't expecting humans to want ferryshaft to come here, she'd been thinking of Lidian as home and it hadn't occurred to her - stupid - well, take the size of the herd, a thousand plus or minus a hundred, she guesses a fifth or thereabouts will be disadvantaged youngsters, and say a third of those willing - "enough to saturate the transportation chokepoint even if my friend gets lots of willing help, and we reproduce quickly without the culls or predation - a six-year generation time." At least that's really not a problem. Surprisingly.
"There are no particular pressing events that demand action, just the ongoing subjugation and culls. They happen at the start of winter, and it was late summer when I left. But - time can be strange in the Sea, and my friend has never made a round trip from Lidian to here before. Which could advantage us or dis-. I will check the moon tonight to see if it's in line with what it would have been had I stayed on Lidian for the last should-have-been half-moon-cycle . . . I don't expect it to correspond exactly, or to be off by more than a few days. You can't see it in the Sea, there's always mist. No day or night either. My friend was going by a timekeeping device."
Auralius probably just said something about magic.